You're welcome, anytime :)! I am aiming to contribute in a lot more areas overall in many mailing lists.
I usually just read. On Tue, Feb 11, 2014 at 2:50 PM, Umair Azam <ua...@i2cinc.com> wrote: > Matthew, > > Thank you so much for detailed information. > > Umair Azam > > > On 2/11/2014 10:20 AM, Matthew Kaufman wrote: > >> Hello, >> >> "By default, XenServer automatically tunes the dom0 settings during >> >> installation. IIRC, on a 4G system, ~768MB gets allocated to dom0. >> >> >> The defaults should work just fine for you. >> >> dom0_mem = 502MB + int(physical_mem * 0.0205) >> >> *Table 2.1. Default Dom0 Memory Size* >> >> >> Physical Memory >> >> Dom0 Memory >> >> 2 GB >> >> 543 MB >> >> 4 GB >> >> 585 MB >> >> 8 GB >> >> 669 MB >> >> 16 GB >> >> 837 MB >> >> 32 GB >> >> 1173 MB >> >> 64 GB >> >> 1845 MB >> >> 128 GB >> >> 3188 MB >> >> 256 GB >> >> 5875 MB >> >> 512 GB >> >> 11249 MB >> >> 1024 GB >> >> 21997 MB >> >> 2048 GB >> >> 43493 MB >> >> >> >> Hello, >> >> Citrix Xen related questions should probably be asked on the Citrix Xen >> mailing lists :) >> >> Actually; His question is regarding dom0 Sizing WITH His Configuration of >> 4GB RAM. >> >> So it shouldn't be on Citirx Xen; it applies to CloudStack hardware >> builders too or anyone running Apache CloudStack ON physical hardware (I'd >> imagine most everybody is here on this mailing list). >> >> >> By default, XenServer automatically tunes the dom0 settings during >>> installation. >>> >> >> >> IIRC, on a 4G system, ~768MB gets allocated to dom0 >>> >>> Here, we use the following sizing computation rules: >> >> Rule: >> dom0_mem = 502 + int(physical_mem * 0.0205) >> >> You should always dedicate a fixed amount of RAM for Xen dom0. >> >> This can be done by specifying "dom0_mem=512M,max:512M" option for the Xen >> hypervisor (usually xen.gz) in grub.conf/menu.lst. This makes sure that >> the >> initial amount of memory allocated for dom0 is 512 MB (note: Replace this >> value with the amount of memory you want to allocate to dom0) and leaves >> the rest of the host system's RAM available for other guests. See this >> grub.conf example for GRUB1: >> >> *Table 2.1. Default Dom0 Memory Size* >> >> >> Physical Memory >> >> Dom0 Memory >> >> 2 GB >> >> 543 MB >> >> 4 GB >> >> 585 MB >> >> 8 GB >> >> 669 MB >> >> 16 GB >> >> 837 MB >> >> 32 GB >> >> 1173 MB >> >> 64 GB >> >> 1845 MB >> >> 128 GB >> >> 3188 MB >> >> 256 GB >> >> 5875 MB >> >> 512 GB >> >> 11249 MB >> >> 1024 GB >> >> 21997 MB >> >> 2048 GB >> >> 43493 MB >> >> >> http://wiki.xen.org/wiki/Xen_Best_Practices#Xen_dom0_ >> dedicated_memory_and_preventing_dom0_memory_ballooning >> >> >
